Sand-drier.



.C. S. FRENCH.

SAND DRIER.

vAPPLICATION FILED 1ML?. 1918.

Patented Aug. 20, 1918.

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C. IS. FRENCH.

SAND DRIEH.

APFLICATLON FILED 1ML?. 191s.

Patented Aug. 20, 1918.

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CHARLES S. FRENCH, 0F EGKMAIN, WESl1 VIRGINIA.

SAND-DRIER.

Specification of Letters Patent.

Patented Aug.. 20, 1918.

Application filed January 7, 1918. Serial No. 210,768.

To aZZ 'whom t may concern:

Be it known that I, CHARLES S. FRENCH, a citizen of the United States, residing at Eckman, in the county of McDowell and :State of West Virginia, have invented certain new and useful Improvements in Sand- Driers, of which the following is a speciiication.

'This invention relates to sand driers and has special reference to sand driers of the type shown in Letters Patent No. 933,898, granted to me September 14, 1909. The object of the present invention is to simplify the construction of the drier so as to reduce the cost of building the same and also improve the operation, a particular aim of the invention being to reduce the liability of the fire box to warp under the heat therein.

The invention is illustrated in the accompanying drawings and consists in certain novel features which will be first fully described and then more particularly pointed out in the appended claims.

In the drawings:

Figure 1 is a perspective view of a sand drier embodying my present improvements,

Fig. 2 is a longitudinal sectional view of the same,

Fig. 3 is a transverse section on the line 3-3 of Fig. 2,

Fig. 4 is a transverse section on theline 4 4 of Fig. 2.

1n building ak sand drier in accordance with my present invention, l employ an ash-pan or pit 1 which will preferably be a metallic rim provided in its front end with an ash door 2 and provided at its rear end with an air inlet 3. The ash-pan may, of course, have a bottom but such bottom is not essential and is not. illustrated, as the rim dening the ash-pan may rest directly upon the ground. A floor 4 is provided at the top of the ash-pan and defines the front and rear portions of the drier, grate bars y5 being supported by flanges 6 on the ioor over the ash-pan so as to support fuel in the usual manner. The front Hoor member 4 terminates short of the vertical side walls 6 of the tire box thereby providing a space or due 7 through which air may flow, as indicated by the arrows in Figs. Q and 4. The said front floor member constitutes the bottom of a fuel chute or passage 8 through which fuel maybe inserted into the iire box and the said chute or opening will be normally covered by a door 9 provided with a damper 10 for regulating the draft. The side walls of the fire box extend vertically upward to a point above the top of the fuel opening or passage 8 and then diverge outwardly at their front ends, as shown at 11, upwardly converging roof plates or deflectors 12 being supported by and extending from the outer edges of the said divergent portions. Below and between the diver-ging portions 11 of the side walls, top or roof plates 13 converge upwardly from the side walls and these plates are supported at their ends in grooved projections 14 provided upon the front and rear end walls 15 and 16 of the fire box, as shown most clearly in Fig. 2. Reinforcing ribs 17 will preferably be provided on the inner sides of the said top plates 13 so as to tend to overcome buckling or warpingthereof. The front wall 15 of the fire box is located at the inner end of the fuel passage 8 and the space between said wall and thefront wall 24 of the drier forms the flue 7, said walls extending above the roof plates 13, and supporting the roof plates 12 at their upper edges. A dedector 13 bridges the iue 7 approximately in the planes of the roof plates 13. The front wall 15 of the lire box is provided above the fuel opening 8 with a plurality of openings 18 through which the air rising through the flue or passage 7 and diverted by the deflector 13 may enter the upper portion of the fire box and flow rearwardly below the top plates 13 thereby preventing the overheating of said top plates and pro longing the life of the drier. The lower portion of the rear wall 16 is imperforate so that the heat cannot pass directly backward into the flue or space 19 formed between the fire box and the outer jacket 20 but must rise so as to pass through the opening 21 in said rear wall. Between the rear wall 16 and the rear wall of said jacket I provide roong plates 35 which cover the ue or space between said walls, but the space between the front and rear walls 15 and 16 above the roong plates 13 is left unobstructed, except as will be presently set forth. The space between said front and rear walls is thus left open to facilitate the loading of sand into the drier, while the inclined plates or roofs constitute deflectors to insure proper circulation of the air currents so as to utilize the heat to the greatest advantage and quicken the drying of the sand. The rooting plates 35 terminate at a nre box, vertical walls arranged in spaced relation to the front and rear end walls of the re box, there being openings in the 'front and rear walls of the fire box connnuncating with the space between the tire box and said walls, an air inlet below the re box in communication with the space between the front end of the saine and the said front wall, deflectors in the space between the said front wall and the front end of the lire box following the lines of the top of the lire box, a deflector in the space between the rear end of the ire box and the rear vertical wall and disposed above the top of the tire box, and horizontal lues disposed above the iire box and in corninunication with chambers above the respective deectors.

2. A sand drier comprising a lire box, vertically disposed lues at the front and rear of the re box, the lower end of the rear flue being closed, openings in the upper portion of the front end rear walls of the re box to establish communication with said flues, the lower portion of the rear wall of the lire box being imperforate, delectors in said iues, horizontal fines connecting the vertical lues, and a smoke stack leading from the rear ue.

3. A sand drier comprising a tire box, a jacket disposed in spaced relation to the sides and rear of the lire box whereby to provide sand containing chambers, and discharging doors disposed longitudinally of the sides of the jacket and adapted to support sand between the same and the sides of the fire box.

4. A sand drier comprising a re box having vertical sides and upwardly converging top plates, iues at the front and rear of the fire box in communication with the front and rear ends of said re box, and reinforcing ribs formed on the under surface of the upwardly converging top plates.

In testimony whereof I aix my signature.

CHARLES S. FRENCH. [L s] Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patente, Washington, D. C. 

